Examples and practice
Correlation and linear regression
Back to lessonPractice section 1 · Questions 1–6
Identify explanatory and response variables · Sketch the eleven insulin and time observations · +4 more
Practice section 2 · Questions 7–12
Compare two scatters and fit both regression directions · Compare two models using squared residuals · +4 more
Practice section 3 · Questions 13–18
Compare linear and squared-speed models of drag · Calculate correlation from six summary values · +4 more
Practice section 4 · Questions 19–24
Compare pollution models and audit a damaged regression fragment · Recover a missing price index and choose the prediction direction · +4 more
- Compare pollution models and audit a damaged regression fragment
- Recover a missing price index and choose the prediction direction
- Compare used-car prices with reciprocal mileage
- Compare fuel-consumption models using squared residuals
- Choose a model with a limiting daily rate
- An outlier reverses the fitted trend
Practice section 5 · Questions 25–30
Refit a logarithmic model after finding a recording error · Transform PSI and recover an additional observation · +4 more
Practice section 6 · Question 31
Compare a linear trend with a transformed quadratic